Semtech / LoRaWAN-lib

LoRaWAN MAC layer implementation

Dependents:   LoRaWAN-demo-72_tjm LoRaWAN-demo-72_jlc LoRaWAN-demo-elmo frdm_LoRa_Connect_Woodstream_Demo_tjm ... more

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LoRa MAC layer cryptography implementation
Functions

LoRa MAC layer cryptography implementation

Functions

void LoRaMacComputeMic (const uint8_t *buffer, uint16_t size, const uint8_t *key, uint32_t address, uint8_t dir, uint32_t sequenceCounter, uint32_t *mic)
 Computes the LoRaMAC frame MIC field.
void LoRaMacPayloadEncrypt (const uint8_t *buffer, uint16_t size, const uint8_t *key, uint32_t address, uint8_t dir, uint32_t sequenceCounter, uint8_t *encBuffer)
void LoRaMacPayloadDecrypt (const uint8_t *buffer, uint16_t size, const uint8_t *key, uint32_t address, uint8_t dir, uint32_t sequenceCounter, uint8_t *decBuffer)
void LoRaMacJoinComputeMic (const uint8_t *buffer, uint16_t size, const uint8_t *key, uint32_t *mic)
void LoRaMacJoinDecrypt (const uint8_t *buffer, uint16_t size, const uint8_t *key, uint8_t *decBuffer)
void LoRaMacJoinComputeSKeys (const uint8_t *key, const uint8_t *appNonce, uint16_t devNonce, uint8_t *nwkSKey, uint8_t *appSKey)

Detailed Description

This module covers the implementation of cryptographic functions of the LoRaMAC layer.

Function Documentation

void LoRaMacComputeMic ( const uint8_t *  buffer,
uint16_t  size,
const uint8_t *  key,
uint32_t  address,
uint8_t  dir,
uint32_t  sequenceCounter,
uint32_t *  mic 
)

Computes the LoRaMAC frame MIC field.

Computes the LoRaMAC frame MIC field

Parameters:
[IN]buffer - Data buffer
[IN]size - Data buffer size
[IN]key - AES key to be used
[IN]address - Frame address
[IN]dir - Frame direction [0: uplink, 1: downlink]
[IN]sequenceCounter - Frame sequence counter
[OUT]mic - Computed MIC field
[IN]buffer Data buffer
[IN]size Data buffer size
[IN]key AES key to be used
[IN]address Frame address
[IN]dir Frame direction [0: uplink, 1: downlink]
[IN]sequenceCounter Frame sequence counter
[OUT]mic Computed MIC field

Definition at line 79 of file LoRaMacCrypto.cpp.

void LoRaMacJoinComputeMic ( const uint8_t *  buffer,
uint16_t  size,
const uint8_t *  key,
uint32_t *  mic 
)

Computes the LoRaMAC Join Request frame MIC field

Parameters:
[IN]buffer - Data buffer
[IN]size - Data buffer size
[IN]key - AES key to be used
[OUT]mic - Computed MIC field

Definition at line 158 of file LoRaMacCrypto.cpp.

void LoRaMacJoinComputeSKeys ( const uint8_t *  key,
const uint8_t *  appNonce,
uint16_t  devNonce,
uint8_t *  nwkSKey,
uint8_t *  appSKey 
)

Computes the LoRaMAC join frame decryption

Parameters:
[IN]key - AES key to be used
[IN]appNonce - Application nonce
[IN]devNonce - Device nonce
[OUT]nwkSKey - Network session key
[OUT]appSKey - Application session key

Definition at line 183 of file LoRaMacCrypto.cpp.

void LoRaMacJoinDecrypt ( const uint8_t *  buffer,
uint16_t  size,
const uint8_t *  key,
uint8_t *  decBuffer 
)

Computes the LoRaMAC join frame decryption

Parameters:
[IN]buffer - Data buffer
[IN]size - Data buffer size
[IN]key - AES key to be used
[OUT]decBuffer - Decrypted buffer

Definition at line 171 of file LoRaMacCrypto.cpp.

void LoRaMacPayloadDecrypt ( const uint8_t *  buffer,
uint16_t  size,
const uint8_t *  key,
uint32_t  address,
uint8_t  dir,
uint32_t  sequenceCounter,
uint8_t *  decBuffer 
)

Computes the LoRaMAC payload decryption

Parameters:
[IN]buffer - Data buffer
[IN]size - Data buffer size
[IN]key - AES key to be used
[IN]address - Frame address
[IN]dir - Frame direction [0: uplink, 1: downlink]
[IN]sequenceCounter - Frame sequence counter
[OUT]decBuffer - Decrypted buffer

Definition at line 153 of file LoRaMacCrypto.cpp.

void LoRaMacPayloadEncrypt ( const uint8_t *  buffer,
uint16_t  size,
const uint8_t *  key,
uint32_t  address,
uint8_t  dir,
uint32_t  sequenceCounter,
uint8_t *  encBuffer 
)

Computes the LoRaMAC payload encryption

Parameters:
[IN]buffer - Data buffer
[IN]size - Data buffer size
[IN]key - AES key to be used
[IN]address - Frame address
[IN]dir - Frame direction [0: uplink, 1: downlink]
[IN]sequenceCounter - Frame sequence counter
[OUT]encBuffer - Encrypted buffer

Definition at line 108 of file LoRaMacCrypto.cpp.

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